Optically Reconfigurable Electrodes for Dielectric Elastomer Actuators

TL;DR

This paper introduces an innovative optically reconfigurable electrode system for dielectric elastomer actuators using UV-light-controlled zinc oxide nanowires, enabling dynamic and localized electrode configurations for advanced soft robotics.

Contribution

It presents a novel electrode architecture based on photoconductive ZnO nanowires that can be optically switched, offering flexible and localized electrode design in dielectric elastomer actuators.

Findings

ZnO nanowires become conductive under UV light

Electrode structures can be dynamically reconfigured

Enhanced design freedom for soft robotics applications

Abstract

An optically addressable and configurable electrode architecture for dielectric elastomer actuators and arrays is described. It is based on embedding photoconductive, zinc oxide (ZnO) nanowires in the DEA to create electrodes. Normally, a network of ZnO nanowires is electrically insulating but it becomes conductive in the presence of UV light with a photon energy above the optical bandgap. Taking advantage of this characteristic optical induced switching behavior, we create an optically addressable electrode design, and create new, localized capacitor structures. As the ZnO nanowires are only conductive where, and when, illuminated the effective electrode structure is not fixed, as is the case with CNT and carbon-black electrodes currently used in DEAs. This provides greater, previously unattainable, freedom in the design of dielectric elastomer actuators for soft robotics and devices.